Analysis

  • max time kernel
    120s
  • max time network
    121s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30-05-2024 19:24

General

  • Target

    Office 365 Smtp Checker by xLotus.exe

  • Size

    1.7MB

  • MD5

    28a0ae801847b00a6d9ab94eb4219960

  • SHA1

    6af322147806d1a82472cc4d55d5acd1b79a5be9

  • SHA256

    85bcedf925b9c4736e58be9585168b8bff41b5ad76d85a188b004967c023bd6c

  • SHA512

    8d53673af698c0aa248ae19e718ca6ce7bd127d11e195c2ccec10f16dd161ac9b0cc879cd30c808fb29bbe57f715de0f15e81f687a2c525af8c27a426f2b84d7

  • SSDEEP

    24576:nnDdfAtPrMkuLBVmAwmCyH2xujp2JN8cSPz10+2yoMTEmPZbS8Mig7yxN82+s+cw:nWM/P5P2xj3e12EwmPNS8Rtz11+Ug

Malware Config

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • AgentTesla payload 2 IoCs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 28 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Office 365 Smtp Checker by xLotus.exe
    "C:\Users\Admin\AppData\Local\Temp\Office 365 Smtp Checker by xLotus.exe"
    1⤵
    • Checks computer location settings
    • Enumerates system info in registry
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1232
    • C:\Users\Admin\AppData\Roaming\Microsoft Corp\svchost.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft Corp\svchost.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:2208
      • C:\Users\Admin\AppData\Roaming\svchost.exe
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        3⤵
        • Drops startup file
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4568
        • C:\Windows\SysWOW64\netsh.exe
          netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\svchost.exe" "svchost.exe" ENABLE
          4⤵
          • Modifies Windows Firewall
          PID:1180

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\Microsoft Corp\svchost.exe

    Filesize

    23KB

    MD5

    71ef183a5a18725806fa656974d49929

    SHA1

    deebe1b2c77f1a9bfd6248f7c47a93e662680558

    SHA256

    68f78f7959a3f8eb3dff29f579125c80e9f0893ce571eb720304d2d7a881cf3c

    SHA512

    abed2549cf3d13e50310b253097a3f9f68cded4465e72d2100301a773105c27b5d5c88913c63a27b6d34e2dea7b546d4c39d95a9c318daf1727c36aced241ac2

  • memory/1232-11-0x000000000A400000-0x000000000A47A000-memory.dmp

    Filesize

    488KB

  • memory/1232-5-0x0000000005610000-0x00000000056A2000-memory.dmp

    Filesize

    584KB

  • memory/1232-1-0x0000000000930000-0x0000000000AEE000-memory.dmp

    Filesize

    1.7MB

  • memory/1232-46-0x0000000074680000-0x0000000074E30000-memory.dmp

    Filesize

    7.7MB

  • memory/1232-44-0x0000000005560000-0x0000000005570000-memory.dmp

    Filesize

    64KB

  • memory/1232-6-0x00000000056B0000-0x0000000005716000-memory.dmp

    Filesize

    408KB

  • memory/1232-7-0x0000000006520000-0x000000000652A000-memory.dmp

    Filesize

    40KB

  • memory/1232-8-0x0000000006900000-0x0000000006BCA000-memory.dmp

    Filesize

    2.8MB

  • memory/1232-9-0x0000000006BD0000-0x0000000006DE4000-memory.dmp

    Filesize

    2.1MB

  • memory/1232-0-0x000000007468E000-0x000000007468F000-memory.dmp

    Filesize

    4KB

  • memory/1232-3-0x0000000074680000-0x0000000074E30000-memory.dmp

    Filesize

    7.7MB

  • memory/1232-2-0x0000000074680000-0x0000000074E30000-memory.dmp

    Filesize

    7.7MB

  • memory/1232-4-0x0000000005F20000-0x00000000064C4000-memory.dmp

    Filesize

    5.6MB

  • memory/1232-42-0x0000000074680000-0x0000000074E30000-memory.dmp

    Filesize

    7.7MB

  • memory/1232-40-0x0000000074680000-0x0000000074E30000-memory.dmp

    Filesize

    7.7MB

  • memory/1232-39-0x000000007468E000-0x000000007468F000-memory.dmp

    Filesize

    4KB

  • memory/2208-37-0x000000006EB10000-0x000000006F0C1000-memory.dmp

    Filesize

    5.7MB

  • memory/2208-26-0x000000006EB12000-0x000000006EB13000-memory.dmp

    Filesize

    4KB

  • memory/2208-27-0x000000006EB10000-0x000000006F0C1000-memory.dmp

    Filesize

    5.7MB

  • memory/4568-38-0x000000006EB10000-0x000000006F0C1000-memory.dmp

    Filesize

    5.7MB

  • memory/4568-43-0x000000006EB10000-0x000000006F0C1000-memory.dmp

    Filesize

    5.7MB